Treating PIF in France 2026: GS-441524 Access After the 2024 Authorization

DVM Vien
May 27
5 min read

Since August 2024, France is the European Union country with the clearest legal pathway for treating Feline Infectious Peritonitis (PIF in French) with GS-441524. A magistral preparation produced by Pharmacie Delpech in Paris allows any French vétérinaire to prescribe GS-441524 for FIP. The 84-day protocol, originally validated by Pedersen et al. (UC Davis, 2019), achieves remission rates above 85% in published data. French owners now have three practical pathways — French magistral preparation, EU verified suppliers, and combinations of both — and a Free FipDr Consultation that helps choose the right one for your cat.

If your vétérinaire has diagnosed your cat with PIF, you have more options today than you would have had eighteen months ago. This guide explains what changed in France, how to navigate the 84-day treatment in 2026, and how FipDr supports French families through it.

The 2024 turning point for French cat owners

In August 2024, French regulatory authorities formally recognized a magistral preparation of GS-441524 produced by Pharmacie Delpech (Paris) for the treatment of FIP. This was a watershed moment for European FIP treatment access. Until that date, French owners — like German, Italian, and Spanish ones — relied on informal supply chains and hoped their vet would help interpret protocols.

After August 2024:

Any French vétérinaire can legally prescribe GS-441524 via the magistral pathway
A tuna-flavored oral suspension became the most prescribed formulation
French specialists rapidly adopted the protocol
One year later (2025), the veterinary press (La Semaine Vétérinaire) reported the protocol working in real-world French practice with results matching published trials

France is now the EU reference market for legal FIP treatment.

What PIF means in French veterinary practice

PIF (Péritonite Infectieuse Féline) is the French clinical term for FIP. French vets typically distinguish:

PIF humide (wet PIF) — effusion in abdomen or thorax
PIF sèche (dry PIF) — no effusion, granulomatous form
PIF oculaire (ocular PIF) — eye involvement, uveitis
PIF neurologique (neuro PIF) — central nervous system involvement, ataxia, seizures

The treatment is GS-441524 for all forms, but the dose differs: wet/dry PIF typically 6 mg/kg/day, ocular 8 mg/kg/day, neurological 10 mg/kg/day or higher. Your French vétérinaire — guided where helpful by FipDr's consulting vets — determines the correct dose for your cat's specific form, weight, and bloodwork picture. See Wet FIP vs Dry FIP: The 2026 Definitive Comparison Guide.

Three legal pathways for French owners in 2026

Pathway 1: French magistral preparation (Pharmacie Delpech, Paris)

Your vétérinaire writes a prescription. Pharmacie Delpech produces an oral suspension (tuna flavor) at a specified mg/mL concentration. You collect from the pharmacy or arrange delivery within France. Cost is typically the highest of the three options because of magistral preparation overhead and oral-suspension excipient costs.

Pathway 2: Verified EU supplier with free consultation (FipDr)

A tested, third-party-analyzed GS-441524 (injectable or oral formulations) ships to your French address within 2–4 days. Each batch comes with a Certificate of Analysis. Free consultation is included — our consulting vets coordinate with your vétérinaire and walk you through the entire 84 days. Cost is meaningfully lower than the magistral pathway.

Pathway 3: Hybrid (start with FipDr, formalize with French magistral)

Many French owners start treatment immediately via FipDr (because PIF is time-critical), then ask their vétérinaire to formalize a magistral prescription for the remaining doses. This combination uses each pathway's strengths.

What PIF treatment costs in France (2026)

French magistral (Pharmacie Delpech): €3,500–5,000 (84 days), 5–10 days to first dose
FipDr verified supplier + free consultation: €1,800–2,400, 2–4 days to first dose
Hybrid: €2,200–3,000 blended, same-day start

For a full breakdown, see FIP Treatment Cost in Europe: A Transparent 84-Day Breakdown.

French cities we ship to (and transit times)

Île-de-France (Paris, Versailles): 2–3 working days
Auvergne-Rhône-Alpes (Lyon, Grenoble): 2–3 working days
PACA (Marseille, Nice, Cannes): 2–4 working days
Occitanie (Toulouse, Montpellier): 2–4 working days
Nouvelle-Aquitaine (Bordeaux): 2–4 working days
Pays de la Loire (Nantes): 2–4 working days
Hauts-de-France (Lille): 2–3 working days
Grand Est (Strasbourg): 2–4 working days
Bretagne, Corsica: 3–7 working days

Packaging is temperature-stable. Summer shipments to PACA and Corsica receive extra thermal protection at no additional cost.

Working with your French vétérinaire

Bring published evidence. The ABCD 2025 guidelines and Pedersen 2019 study are references your vétérinaire will respect.

Confirm diagnosis with the right tests. Effusion analysis (Rivalta test, cytology), serum AGP, A:G ratio, abdominal ultrasound. If neurological PIF, referral to a CHV may be needed.

Loop FipDr's veterinary team in. Our consulting vets are happy to speak with your vétérinaire directly — a 15-minute call usually closes any knowledge gap.

Questions French cat owners ask most

Le GS-441524 est-il légal en France ? (Is GS-441524 legal in France?)

Yes. Since August 2024, GS-441524 is legally prescribed in France via the magistral preparation framework. Any French vétérinaire can prescribe it.

Combien de temps dure le traitement ? (How long is treatment?)

84 days of daily dosing, followed by an 84-day observation window. Total: 168 days from first dose to clinical discharge. Bloodwork at day 0, 28, 56, 84.

What is the SNVEL position on GS-441524?

The Syndicat National des Vétérinaires d'Exercice Libéral (SNVEL) has not formally opposed magistral prescription of GS-441524. Individual vétérinaires retain prescribing autonomy under French veterinary law.

What if my cat has neurological PIF?

Neurological PIF responds to GS-441524 but typically requires higher doses (often 10 mg/kg/day or more). See FIP Cat Survival Rate with GS-441524: 2026 Clinical Outcomes for outcome data by form.

Buying safely: the counterfeit problem still exists in France

Despite the 2024 legalization, gray-market product circulates through informal French Telegram and Facebook groups. Counterfeit and underdosed GS-441524 is the largest single avoidable risk for French FIP cats today. Verify any source has third-party HPLC purity testing (≥99%), endotoxin testing for injectables, Certificate of Analysis for your specific batch, documented chain of custody, and a licensed vet you can speak with throughout treatment. FipDr provides all five. For more, see How to Buy GS-441524 in Europe Safely.

Start with a free consultation

Before you order anything, talk to a vet who has managed hundreds of FIP cases. Our consultation is free for French cat owners and your vétérinaire can be looped in at any point. We confirm the PIF picture fits, calculate the correct dose for weight and form (humide, sèche, oculaire, neurologique), outline the 84-day protocol, explain shipping, and stay available throughout treatment and observation.

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